On 23.03.2010 02:28, Ben Finney wrote: > Antoine Pitrou<solipsis at pitrou.net> writes: > >> Barry Warsaw<barry<at> python.org> writes: >>> >>> When Python is being installed, either by a from-source 'make >>> install' or by the distro packager, then you'd expect the umask not >>> to be insane. In the latter case, it's a bug and in the former case >>> you screwed up so you should be able to delete and reinstall, or at >>> the very least execute the same `find` command that Python's own >>> Makefile calls (in my branch) for 'make clean'. >>> >>> When you're installing packages, again, I would expect that the >>> system installer, or you via `easy_install` or whatever, would not >>> have an insane umask. >> >> Well, precisely. That's why I suggest that creating the __pycache__ >> directories be done *at install time* (or packaging time), and not via >> the core import machinery (that is, not at import time). That is, when >> you *know* you are the right user, with the right umask. > > +1. > > Taking advantage of caching directories that have already been set up > correctly in advance at install time is friendly. Littering the runtime > directory with new subdirectories by default is not so friendly. > > Perhaps also of note is that the FHS recommends systems use > ‘/var/cache/foo/’ for cached data from applications: > > /var/cache : Application cache data > > Purpose > > /var/cache is intended for cached data from applications. Such data is > locally generated as a result of time-consuming I/O or calculation. The > application must be able to regenerate or restore the data. Unlike > /var/spool, the cached files can be deleted without data loss. The data > must remain valid between invocations of the application and rebooting > the system. > > <URL:http://www.debian.org/doc/packaging-manuals/fhs/fhs-2.3.html#VARCACHEAPPLICATIONCACHEDATA> > > This would suggest that Python could start using ‘/var/cache/python/’ > for its cached bytecode tree on systems that implement the FHS. it reads *data*, not code.
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